http://www.kuolin.org/k6.htm
http://baike.baidu.com/view/478666.htm
http://www.yaolan.com/nutrition/article2007_4570688974.shtml
http://www.yaolan.com/health/article2007_464081636412.shtml
http://www.vitasquare.com/m_element/element_detail.asp?ckid=1&cid=180
